To nullify or make something ineffective.

रद्द करना

English Usage: The committee decided to cancel the event due to bad weather.

Hindi Usage: समिति ने खराब मौसम के कारण कार्यक्रम को रद्द करने का निर्णय लिया।

The act of deciding that an organised event will not happen.

रद्दीकरण

English Usage: The cancellation of the flight was announced early in the morning.

Hindi Usage: सुबह जल्दी उड़ान के रद्दीकरण की घोषणा की गई।